How to execute methods in a sequence in Angular

Hi, I'm stuck with a problem. I wan't to do this:

Load a dashboard witch consists of several widgets.

One widget is called Bookings and lists all bookings for a certain person.

This functionality is OK!

I want to push on a button New booking witch calls another application also made i Angular.

Now I want that my code shall wait until the app new booking is finished.

After that I want to update the widget with bookings on the dashboard with new bookings.

All functionality listed above is in a method which is called from the HTML page where the widget is.

My code in the method that is fired by the HMTL page looks like this:

callBookingCreate();

callUpdateDashboard();

When I push on the button New bookings both methods are executed at once before I am finished with the new bookings app.

I wan't to call the bookings app (first call) and wait for the new bookings app is finished and the execute the next line of code which are callUpdateDashboard().

How can I do that?